Muffler



y 1 1944. F. K. BATCHELOR ETAL 2,348,706

MUFFLER 2 ShetS-SheGt 1 Filed June 9, 1945 t? i Inventor Q 52%;; h- Mai/elf? WWW y 1944- F. K. BATCHELOR ET AL 2,348,706

MUFFLER Filed June 9, 1943 2 Sheets-Sheet 2 Im/entw Eederz'cfi /f Bwickelor Sadne ZBecker WWW 19m Patented May 16, 1944 MUFFLER Frederick K. Batchelor and Sidney E. Becker, Huntington Park, Calif.

Application June 9, 1943, Serial No. 490,216

2 Claims.

The present invention relates to new and useful improvements in muiilers for internal combustion engines or similar power plants and has for its primary object to provide suction means in the mufller adapted to overcome back pressure and improve the eiilciency of the muffier as well as the motor.

A further object is to provide a device of this character of simple and practical construction, relatively inexpensive to manufacture and otherwise well adapted for the purposes for which the same is intended.

Other objects and advantages reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming part hereof, wherein like reference numerals refer to like parts throughout, and in which:

Figure 1 is a side elevational view.

Figure 2 is a longitudinal sectional view.

Figure 3 is an end elevational view.

Figures 4 to 11, inclusive, are transverse sectional views taken respectively on the lines 4-4; 55;66;11;88;99; Ill-40; and Hll of Figure 2.

Figure 12 is an end elevational view of the suction fan, and

Figure 13 is a side elevational view thereof.

Referring now to the drawings in detail, the numeral 5 designates a cylindrical casing having one end closed by an end plate 6 and its other end closed by an end plate I.

A plurality of bafiie plates 8, 9, 10, ll, l2, l3 and M, are secured in the casing in spaced relation, each plate having openings It, most of which are staggered with respect to each other as shown in Figure 2.

A tube I1 is inserted through the end plate 6 and also projects through the adjacent baflle plates 8 and 9. The sides of the tub within the casing are perforated as shown at l8, and the outer end of the tube is adapted for attaching to the exhaust pipe of the engine in any suitable manner.

Adjacent the end plate 1 and spaced therefrom is an imperforate plate I5 forming a fan chamber or housing IS in the casing, the plate 15 having a tube extending therethrough and extending into the chamber IS. The front end of the tube 20 is also perforated in its side walls.

A suction fan 2| is operatively mounted in the chamber i9 by means of a shaft 22 journaled in the end plate I and also journaled in a bearin housing 23 projecting outwardly from the plate I. A pulley or other suitable driven element 24 is secured on the outer end of the shaft 22 and adapted for operation from/ a suitable part of the engine.

A lateral discharge port 25 is connected to one side of the chamber l9, and curved circumferentially.

In the operation of the device the suction created in the casing by the fan pulls the exhaust gases through the baille plates and facilitates its passage therethrough as well as preventing back pressure therein.

It is believed the details oi construction, operation and manner of use of the device will be readily understood from the foregoing without further detailed explanation.

Havi'ng described the invention, what is claimed as new is:

1. A muiiier comprising a cylindrical casing closed at each end, a plurality of perforated baflles arranged in spaced relation in the casing, an attaching tube projecting through one end of the casing for attaching to an engine exhaust pipe, said tube being open at each end and extending through at least one of the baflles and having perforated walls at its inner end behind the battles, an imperforate plate secured in the casing adjacent its other end and forming a chamber having an outlet in one wall of the casing, a suction fan mounted in the chamber, means attached to the fan outwardly of the casing to form a drive connection for the fan, and a tube in the imperforate plate providing communication between the interior of the casing and the chamber.

2. A muflier comprising a cylindrical casin closed at each end, a plurality of perforated baflles arranged in spaced relation in the casing, an attaching tube projecting through one end of the casing for attaching to an engine exhaust pipe, said tube being open at each end and extending through at least one of the baiiles and having perforated walls at its inner end behind the bailles, an imperforate plate secured in the casing adjacent its other end and forming a chamber therein, a paddle-wheel type suction fan mounted in the chamber, a circumferentially curved discharged port in one side of the chamber extending in the direction of travel of gases under the influence of the fan, a drive attachment for the fan, and a tube in the imperforate plate providing communication between the interior of the casing and the chamber, said fan having notches in the edges of its blades adjacent the imperforate plate to form a recess axially of the fan and said last-named tube projecting into said recess to discharge gases passing through the mufller at a point substantially midway of the side edges of the blades of the fan.

FREDERICK K. BATCHELOR. smmw a. 

